Spacing punch



Feb. 2, 1932.

H. A. HORST ET AL 1,843,323

SPACING PUNCH Filed April 2, 1928 FIE E FIE? A HORST INVENTOR5. 4. 0. 'HOAJT- BY A TT ORNE Y Patented Feb. 2, 1932 UNITEDSTATES P TENT OFFICE 15 HARRY A. HORST AND LEROY o. HORST, or mm ioY, IOWA, r

sracme rune Application filed April: 2, 1928. Serial No. 266,832;

The present invention pertains generically to spacing punches used in placing punch marks at a given distance from each other or from a patternline. -Among the objects of this invention'are to provide an improved tool of the character indicated; to provide a tool of the character stated in which the movable'punch element moves in a direction ,parallel'to the axisof the punch; to provide a unch'of the character indicated-in which the. distance between the fixed and movable punch elements may be adjusted to vary the distance between the punch marks or between the guide line and the punch mark, said punch being so constructed that the distance between the points will not vary as the movable point moves back toward the body of the punch; to provide a head of the character indicated adapted to be substituted forthe marking point of an automatic prick punch; and such further objects, advantages and capabilities as will hereafter appear-and as are inherent in the construction disclosed herein. Our invention further resides in the combination, construction and. arrangement of parts illustrated in the accompanying drawings'and, while we have shown therein what is now'considered the preferred embodiment of our invention together with a simplified form thereof, we desire it understood that this disclosure is tobe'interpreted as illustrative only and isv not to be'construe'd in a limiting sense. z

In the drawings annexed hereto and forminga part hereof, Fig. lis an elevation of what is now considered the preferred form of our inventionwith the parts inoneposition of adjustment; Fig. 2 1s a similar v ew with the parts in a dilferentlyadjusted posi-v tion; Fig. 3 is a fragmentary longitudinal section of the same construction with the parts in astill diife'rently adjusted position;

Fig. 4 is a transverse section substantially through the plane of the locking screw; Fig. 5 is an elevation fof a simplified form of our construction in which 'the's aeing between the points is notl adjustable; Fig. 6 is a sectional elevation of the construction; shown in Fig. 5; .Fig. 7 is struction in Figs: *1 to i, the "device being the head.

a modification of the icon-.

constructed for attachment to an automatic prick punch or center punch. f

Referring more in detail to the annexed drawings, numeral 1' denotes the body of a punch constructed in accordance with our invention,-said body, in the form shown in Figs. 1to'4, having an enlarged head 2 for the reception of the .prick punch elements. Within this head are two cylindrical 0 enings in one *of which is located the Exed e punch element 3 and in the other of which is located the cylindrical element l, carrying the spring pressed reciprocable punch element 5. The purpose of this latter element is to serve as a guide'in' the placing of *thetool. The element 3 has a notch in one side thereof near its inner end and this notch is in alignment with a perforation through the body 1. A locking pin 6 extends through this perforation and through the notch inthe punch element 3, the purpose being to lock the latter in position in the head.

'Oneside ofthe element 5 is flattened as indicated at 7 and cooperates with a-perforation extending transversely through the cylinder 4 for the reception of the locking pin 8. The member 5 may be pushed backwardly into'the cylinder 4; because ofthe notch 7 in the side thereof. This plunger 5 is forced outwardly" by acoil spring-9 located in-the same hole as the punch element or plunger 5 andbetween theinnerend' thereofjand the inner end of the socket which receives element 5. The pin S-limits the movement 'of element 5 in both directions. This pin" is put through the cylinder l'to lock element 5 in place, before-the cylinderis put into the socket in the head 2. This pin will therefore be held in'place by the surrounding wall of An arcuate' slot 10 extending throughthe. thin wall of the head receives the screw threaded end of the locking member 11 which is screwed into the cylinder 4. When this of the fact that the former is eccentrically mounted in the cylinder 4,. When a proper adjustment of the distance between the points of elements 3 and 5 has been secured, the securing screw 11 is tightened up to hold the cylinder l in adjusted position. The tool is then ready for use in the manner customary with tools of this character. A hole 12 is provided in the head so that, when the screw 11 has been removed, a slender tool may be inserted to force the cylinder out, in event it should fit too tightly to be readily removed otherwise. I

In the construction shown in Figs. 5 and 6', pin 13 takes the place of both pins Sand 8 and holds the two prick punch elements in the head 2 of the punch, one of them being rigidly mounted and the other slidably mounted as described above.

In the construction shown in Fig. 7, numeral 14 designates the body of an automatic punch in which is reciprocable the plunger element 15 which is normally forced outwardly by means of a spring as is well known to those familiar with this art. This device is provided internally with a hammer to deliver ablow to the inner end of the plunger 15. This being old construction, it is not considered necessary to illustrate the same. The plunger 15 has a screw threaded opening in its forward end for the reception of a prick punch point (not shown) and this point may be removed to be replaced by the head shown in Fig. 7. Inthis construction, the punch element 3 has its inner end slight- 1y reduced and screw threaded as indicated at 16. This screw thread-ed end is screwed into the opening in the end of the plunger 15, replacing the punch point removed therefrom. This construction enables our device, when made in this form, to be used in an au tomatic punch of the type referred to, it being then unnecessary to use a hammer to cause element 3 to make the desired marks in the material being worked upon. v

A fault present in one of the prior devices of this type is that the movable plunger 5 does not move in a direction parallel to the axis of the punch and therefore, as this moves 'backwardly under the influence of pressure exerted upon the punch, the distance between the points of elementsS and 5 is constantly varying and one has difliculty in getting the punch to make the marks at the proper distance apart, or to properly space the marks made by element 3 from the guide line upon which element 5 is placed. A difficulty with another form of this type of construction, which has a spring arm upon one side, similar in a general way to a compass leg,.is that, though the distance may be properly measured when the tool is not in place,.the resiliency of the spring permits enough bending so that the points do not remain a constant distance apart. In this form, also the movable point does not normally travel in a direction parallel to the axis of the punch and, therefore, the difficulty referred to above is present.

It is of course understood that the specific description of structure set forth above may be departed from without departing from the spirit of our invention as set forth in this specification and the appended claims.

Having'now described our invention, we claim:

1. A tool of the character described comprising an elongated body having a head at one end thereof, said head having a plurality of parallel chambers therein, a fixed punch point in one of said chambers, a cylinder in the other chamber, a chamber in said cylinder, a movable point in the last mentioned chamber, resilient means tending to force the movable point out of the chamber in a direction parallel to the axis of the fixed point, and means to prevent the points from becoming detached from the head.

2. A tool of the character indicated comprising an elongated body having a head at one end thereof, said head being provided with a pair of chambers parallel with the longitudinal axis of the tool and extending inwardly from one face thereof; a fixed punch point in one of said chambers, a cylinder rotatable in the other chamber about an axis parallel with the longitudinal axis of the punch, said cylinder being provided with an eccentrically located chamber having its longitudinal axis parallel with the longitudinal axis of the punch, a movable punch ele- 1 ment mounted in the last named chamber and adapted to slide therein, resilient means adapted to be compressed to permit the punch element to move inwardly in the chamber and tending to force the same outwardly when the external pressure causing the compression is released, and means whereby the cylinder may be rotated or secured in adjusted position.

3. In a spacing punch, a body having a substantially cylindrical cavity therein, a cylinder mounted in said cavity for rotation therein, a punch point eccentrically mounted in said cylinder in substantial parallelism with the axis of the cylinder, and a punch point carried by the body external to said cavity and substantially parallel to the first punch point. 7

. 4. A punch of the general character indicated comprising an elongated body provided with an enlarged head, said head having cavities therein extending substantially parallel to the longitudinal axis of the body, and punch points in the cavities, a part of the head carrying one of the punch points being rotatably mounted with relation to another part, the axis of rotation being substantially parallel to the punch points and external to both of them so that one punch point can be made to approach and recede from the other, 1

the two being kept substantially parallel at all times.

5. A punch of the character described having an elongated, plural part head provided 5 with a pair of substantially cylindrical openings extending in a direction substantially parallel to the lengthwise axis of the head, and located in the respective parts thereof, punch points mounted in said opening for motion relatively to each other, one part of the head carrying one of the points toward and away from the other by virtue of its rotation about an axis substantially parallel to the axes of the two punch points, said axis being located external to the axes of the two points.

6. A tool of the nature indicated comprising an elongated body having a head at one end thereof provided with substantiallyparallel adjacent openings extending inwardly from one face of the head, a punch point in one of the openings, a cylinder in the other opening rotatable about its longitudinal axis, and a punch point located in said cylinder eccentrically to the longitudinal axis thereof.

7. A structure as defined by claim 6 having means extending through a wall of the head, whereby the cylinder may be rotated about its longitudinal axis. 1

39 8. A structure as defined by claim 6 having a slot in a wall of the head, and means extending therethrough and intothe cylinder whereby the latter may be rotated in its opening in the head or secured against movement therein.

' 9. A tool of the character indicated comprising an elongated body having a head at one end thereof, said head having a plurality of parts each having a chamber therein, a fixed punch point in one of said chambers, a movable point in the other chamber, resilient means tending to force the movable point out of the chamber in a direction parallel to the axis of the fixed point, one part of said head being rotatable aboutthe axis of the other part thereof and the points being eccentrically positioned with relation to the axes of the parts of the head, so that, upon relative rotation of said parts, one of the punch points 59 is capable of approaching and receding from the other with the axes of the two punch points always in substantial parallelism.

In witness whereof, we hereunto subscribe our names to this specification. H. A HORST.

L. O. HORST. 

